Our Complex Strength Zipper Tester is used for testing the strength of the zipper of parallel drawing,self-locking, association of chips & zip head, up-down pulling resistance, tail-opened pulling and strength of silk, polyester & zipper ribbons, etc. The tester also helps in testing the open end attachment, fastener's lateral strength and stringer slider retention. It makes sure that the zipper is durable, defect-free and have high strength. The Complex Strength Zipper Tester is easy to install and operate and gives the exact result. Made from high-grade metal, the tester has a long working life with negligible maintenance cost. Also, it works in an excellent speed so as to fasten up the testing process.